code: def __call__(self, batch):
      return self.collate_fn(
          [self.collate_task(task) for task in batch]
      )
  
file_path: pytorch-meta/torchmeta/utils/data/dataloader.py
imports: from collections import OrderedDict
  from torch.utils.data import DataLoader
  from torch.utils.data.dataloader import default_collate
  from torch.utils.data.dataset import Dataset
  from torchmeta.utils.data.dataset import CombinationMetaDataset
  from torchmeta.utils.data.sampler import CombinationSequentialSampler, CombinationRandomSampler
label_desc: Use image node_id 3 for calling the BatchMetaCollate obj's underlying member method code with example usage: obj.__call__(batch) and returns: self